Allow APKs to install when verifier times out.

When app verfication is enabled and the verifier times out, allow
PackageManagerService to continue with the installation.

Bug: 6531120
Change-Id: Ic6aef755af92588e8887c918b70fb195c683b24c
diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index 8b7ee0e..778294c 100644
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -4255,6 +4255,9 @@
         /** Timeout for package verification. {@hide} */
         public static final String PACKAGE_VERIFIER_TIMEOUT = "verifier_timeout";
 
+        /** Default response code for package verification. {@hide} */
+        public static final String PACKAGE_VERIFIER_DEFAULT_RESPONSE = "verifier_default_response";
+
         /** {@hide} */
         public static final String
                 READ_EXTERNAL_STORAGE_ENFORCED_DEFAULT = "read_external_storage_enforced_default";